Explore concepts like balance, center of gravity, weight distribution - while building a simple child's spinning toy. Challenge Saturday, the last Saturday of each month, will culminate in two visitor contests - a tops death match in our battling dome of doom, and a solo endurance competition - whose top will spin longest? Join us in the Tinkering Studio each Saturday for hands-on building fun led by our tinkering gurus. Visitors work together on creative activities designed to spark curiosity and foster exploration. Activities included with admission.